Summary: Trapped in the jagged canyons of Croatia's Velebit Mountain, new partners Grady and Josh must work together to navigate the frigid, fast-moving rapids, and descend treacherous waterfalls in order to find salvation in this remote landscape.

Summary: Grady and Josh slash their way through the Nicaraguan jungle battling snakes, mosquitoes and dehydration. They struggle to start a fire using a soil testing kit, go on a nighttime hunt for caiman and build a raft to cross croc-infested waters.

Summary: Grady and Josh face a whiteout blizzard, freezing temperatures and a run-in with a deadly predator on the slopes of Bulgaria's Rila Mountains.

Summary: Shipwrecked on an island in the South China Sea, castaways Grady and Josh demonstrate their resourcefulness by repurposing garbage on the beach to desalinate water, construct shelter, hunt for food, and ultimately signal for rescue.

Summary: Stranded in the high altitudes of the Peruvian Andes, Grady and Josh battle crippling altitude sickness and the hallucinations that come with it. They must find fresh water fast in order to navigate this rough landscape in pursuit of civilization.

Summary: Air Force veteran Bo McGlone teams up with former Green Beret Grady Powell on Wyoming's frigid Big Horn Mountains in the dead of a brutal winter. Navigating the exhausting, snowy terrain will push them to their limits.

Summary: Military Veterans Grady Powell and Bo McGlone are dropped into separate locations of a Colombian jungle to play out a military operation gone awry. With only a map and machete, they must survive in the dense jungle while trying to find rescue.

Summary: Survival tips and series highlights are presented.